摘要
提出了SVC控制的一种新策略,包括两阶段的斜率控制和两种电压控制,分别是稳态电压控制和浮动电压控制。实行这两种控制的目的是通过与有载调压器的配合,在稳态情况下,减少SVC的无功功率输出,从上级网络获得无功进行补偿。当电压偏离稳态电压时,SVC使用无功备用进行迅速反应,以保证电压稳定。当电压波动达到一个新的稳定工作点时,浮动电压控制通过改变SVC输出,使其返回到稳定电压运行区域,从而达到了稳定电压和保证电能质量的目的。
This paper presents a new SVC control strategy with two stages of regulation slopes and two voltage regulation controls, which are fixed-voltage reference control and variable （floating） voltage reference control. The object of this control is to limit the reactive power output of the SVC to the desired value among the steady-state voltage range and compensate the reactive power from the upstream networks via the coordination with the under-load tap changer （ULTC）. However, when the voltage deviates the steady-state voltage range, the SVC will react to support the system voltage using the SVC reactive power reserve. When a disturbance results in a new operating point, with a steady-state reactive-power output, the variable voltage reference control changes the SVC output within the steady-state margin to keep the voltage stable and improve the power quality.
出处
《继电器》
CSCD
北大核心
2007年第21期47-50,共4页
Relay
关键词
静止无功补偿
有载调压器
无功备用
static var compensator
under-load tap changer
reactive power reserve
